203mm rotor installation help!

So I got a 203 shimano ice tech rotor bought the adapter for my avid elixer 1. Got a torque wrench and put the rotor on fine. Problem the caliper still is hitting the rotor a little bit seems like I need some washers. It just came with the adapter no extra bolts or washers any ideas should I just take it to the lbs ?

When you say the caliper is still hitting the rotor, do you mean that the pads are dragging? If so, that sounds exactly like what I went through when I upgraded my brakes. My LBS fixed it with shims and a little fine tuning.

My 203 ice tech rotor rides very close to the top of the rotor slot of the caliper. It doesn't rub though. What kind of fork do you have, and do you have the proper adapter between your fork and caliper?

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You need to attach the adapter directly to the fork (there should be another set of holes below the post holes). Then attach the brake caliper, the adapter should stay put without the brake being attached.

180s mount differently than 203s. There should be holes on the little tab that is sticking out below your caliper and one correspondingly below the other post. If there isnt then your adapter wasn't made properly.

There should be only one set of holes on the fork, that is normal. There are 2 sets on the adapter. You attach the adapter to the fork with 2 bolts, then using another pair of bolts attach the caliper to the adapter, (so you need 4 bolts in total) it is very straightforward.